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time.h revision 1.32 
      1 /*	$NetBSD: time.h,v 1.32 2003/09/13 22:31:04 kleink Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1989, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  * (c) UNIX System Laboratories, Inc.
      7  * All or some portions of this file are derived from material licensed
      8  * to the University of California by American Telephone and Telegraph
      9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     10  * the permission of UNIX System Laboratories, Inc.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)time.h	8.3 (Berkeley) 1/21/94
     37  */
     38 
     39 #ifndef _TIME_H_
     40 #define	_TIME_H_
     41 
     42 #include <sys/cdefs.h>
     43 #include <sys/featuretest.h>
     44 #include <machine/ansi.h>
     45 
     46 #include <sys/null.h>
     47 
     48 #ifdef	_BSD_CLOCK_T_
     49 typedef	_BSD_CLOCK_T_	clock_t;
     50 #undef	_BSD_CLOCK_T_
     51 #endif
     52 
     53 #ifdef	_BSD_TIME_T_
     54 typedef	_BSD_TIME_T_	time_t;
     55 #undef	_BSD_TIME_T_
     56 #endif
     57 
     58 #ifdef	_BSD_SIZE_T_
     59 typedef	_BSD_SIZE_T_	size_t;
     60 #undef	_BSD_SIZE_T_
     61 #endif
     62 
     63 #ifdef	_BSD_CLOCKID_T_
     64 typedef	_BSD_CLOCKID_T_	clockid_t;
     65 #undef	_BSD_CLOCKID_T_
     66 #endif
     67 
     68 #ifdef	_BSD_TIMER_T_
     69 typedef	_BSD_TIMER_T_	timer_t;
     70 #undef	_BSD_TIMER_T_
     71 #endif
     72 
     73 #define CLOCKS_PER_SEC	100
     74 
     75 struct tm {
     76 	int	tm_sec;		/* seconds after the minute [0-61] */
     77 	int	tm_min;		/* minutes after the hour [0-59] */
     78 	int	tm_hour;	/* hours since midnight [0-23] */
     79 	int	tm_mday;	/* day of the month [1-31] */
     80 	int	tm_mon;		/* months since January [0-11] */
     81 	int	tm_year;	/* years since 1900 */
     82 	int	tm_wday;	/* days since Sunday [0-6] */
     83 	int	tm_yday;	/* days since January 1 [0-365] */
     84 	int	tm_isdst;	/* Daylight Savings Time flag */
     85 	long	tm_gmtoff;	/* offset from UTC in seconds */
     86 	__aconst char *tm_zone;	/* timezone abbreviation */
     87 };
     88 
     89 __BEGIN_DECLS
     90 char *asctime __P((const struct tm *));
     91 clock_t clock __P((void));
     92 char *ctime __P((const time_t *));
     93 double difftime __P((time_t, time_t));
     94 struct tm *gmtime __P((const time_t *));
     95 struct tm *localtime __P((const time_t *));
     96 time_t mktime __P((struct tm *));
     97 size_t strftime __P((char * __restrict, size_t, const char * __restrict,
     98     const struct tm * __restrict));
     99 time_t time __P((time_t *));
    100 
    101 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
    102     defined(_NETBSD_SOURCE)
    103 
    104 #ifdef __LIBC12_SOURCE__
    105 #define CLK_TCK 100
    106 #else
    107 
    108 /*
    109  * CLK_TCK uses libc's internal __sysconf() to retrieve the machine's
    110  * HZ. The value of _SC_CLK_TCK is 39 -- we hard code it so we do not
    111  * need to include unistd.h
    112  */
    113 long __sysconf __P((int));
    114 #define CLK_TCK		(__sysconf(39))
    115 
    116 #endif
    117 
    118 extern __aconst char *tzname[2];
    119 void tzset __P((void));
    120 
    121 /*
    122  * X/Open Portability Guide >= Issue 4
    123  */
    124 #if (_XOPEN_SOURCE - 0) >= 4 || defined(_NETBSD_SOURCE)
    125 extern int daylight;
    126 #ifndef __LIBC12_SOURCE__
    127 extern long int timezone __RENAME(__timezone13);
    128 #endif
    129 char *strptime __P((const char * __restrict, const char * __restrict,
    130     struct tm * __restrict));
    131 #endif
    132 
    133 #if (_POSIX_C_SOURCE - 0) >= 199309L || (_XOPEN_SOURCE - 0) >= 500 || \
    134     defined(_NETBSD_SOURCE)
    135 #include <sys/time.h>		/* XXX for struct timespec */
    136 struct sigevent;
    137 struct itimerspec;
    138 int clock_getres __P((clockid_t, struct timespec *));
    139 int clock_gettime __P((clockid_t, struct timespec *));
    140 int clock_settime __P((clockid_t, const struct timespec *));
    141 int nanosleep __P((const struct timespec *, struct timespec *));
    142 int timer_create __P((clockid_t, struct sigevent * __restrict,
    143     timer_t * __restrict));
    144 int timer_delete __P((timer_t));
    145 int timer_getoverrun __P((timer_t));
    146 int timer_gettime __P((timer_t, struct itimerspec *));
    147 int timer_settime __P((timer_t, int, const struct itimerspec * __restrict,
    148     struct itimerspec * __restrict));
    149 #endif /* _POSIX_C_SOURCE >= 199309 || _XOPEN_SOURCE >= 500 || ... */
    150 
    151 #if (_POSIX_C_SOURCE - 0) >= 199506L || (_XOPEN_SOURCE - 0) >= 500 || \
    152     defined(_REENTRANT) || defined(_NETBSD_SOURCE)
    153 char *asctime_r __P((const struct tm * __restrict, char * __restrict));
    154 char *ctime_r __P((const time_t *, char *));
    155 struct tm *gmtime_r __P((const time_t * __restrict, struct tm * __restrict));
    156 struct tm *localtime_r __P((const time_t * __restrict, struct tm * __restrict));
    157 #endif
    158 
    159 #if defined(_NETBSD_SOURCE)
    160 time_t time2posix __P((time_t));
    161 time_t posix2time __P((time_t));
    162 time_t timegm __P((struct tm *const));
    163 time_t timeoff __P((struct tm *const, const long));
    164 time_t timelocal __P((struct tm *const));
    165 #ifdef __LIBC12_SOURCE__
    166 char *timezone __P((int, int));
    167 #endif
    168 void tzsetwall __P((void));
    169 struct tm *offtime __P((const time_t *const, const long));
    170 #endif /* _NETBSD_SOURCE */
    171 
    172 #endif /* !_ANSI_SOURCE */
    173 __END_DECLS
    174 
    175 #endif /* !_TIME_H_ */
    176